Covalent Amine Tethering on Ketone Modified Porous Organic Polymers for Enhanced CO2 Capture. Issue 23 (27th October 2020)

• Record Type: Journal Article
• Authors: Jorayev, Perman; Tashov, Intizar; Rozyyev, Vepa; Nguyen, Thien S.; Dogan, Nesibe A.; Yavuz, Cafer T.
• Is Part Of: ChemSusChem. Volume 13:Issue 23(2020)
• Page Start: 6433
• Page End: 6441
• Publication Date: 2020-10-27
• Subjects: amine impregnation -- carbon capture -- Friedel-Crafts acylation -- nanoporous materials -- post-modification; Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.202002190
• Languages: English
• ISSNs: 1864-5631

Abstract

Abstract: Effective removal of excess greenhouse gas CO2 necessitates new adsorbents that can overcome the shortcomings of the current capture methods. To achieve that, porous materials are often modified post‐synthetically with reactive amine functionalities but suffer from significant surface area losses. Herein, we report a successful amine post‐functionalization of a highly porous covalent organic polymer, COP‐130, without losing much porosity. By varying the amine substituents, we recorded a remarkable increase in CO2 uptake and selectivity. Ketone functionality, a rarely accessible functional group for porous polymers, was inserted prior to amination and led to covalent tethering of amines. Interestingly, aminated polymers demonstrated relatively low heats of adsorption, which is useful for the rapid recyclability of materials, due to the formation of suspected intramolecular hydrogen bonding. Abstract : Ketones to the rescue : Porous polymers with ketone functionalities are rare despite the potential in covalently anchoring amines. A new post‐functionalization with chloroacetyl chloride presented a unique opportunity, where the tethered amines show enhanced carbon capture and intramolecular interactions, leading to highly effective CO2 adsorbents.